I have just bought a 56 plate Focus LX 1.8 TDCI and would like to upgrade the side lights, dipped lights and full beam lights. Would it be possible to upgrade to xenon bulbs without needing to replace the whole headlights? I have searched around the net and not found any definate answers to my question. Not sure if you need to know if it's a mk2 or mk2.5, I am not 100% on what the differences are?

Ah ok I see. Well I have just spent a lot of money on this car already so I can't afford another grand or so... I will have a look at the osram cool blue intense, cos they seem to be quie popular. Do you know what type bulb will fit my focus?

you have kind of answered your own question lol just change the bulbs.
easiest way is a trip to halfrauds and look for the bulbs that say bright white or xenon look... but dont pay for fitting charge as there are loads of pics on here that can help you...
with regards to your car id guess its a mk 2...the mk 2.5 is the facelift version, slightly different body and different lights... have you got the clear silver rear lights?

you have kind of answered your own question lol just change the bulbs.easiest way is a trip to halfrauds and look for the bulbs that say bright white or xenon look... but dont pay for fitting charge as there are loads of pics on here that can help you...with regards to your car id guess its a mk 2...the mk 2.5 is the facelift version, slightly different body and different lights... have you got the clear silver rear lights?